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Quality assessment of the Italian Landslide Inventory using GIS processing

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Abstract

Landslides constitute one of the most important natural hazards in Italy as they are widespread and result in considerable damage and fatalities every year. The Italian Landslide Inventory (IFFI) Project was launched in 1999 with the aim of identifying and mapping landslides over the entire Italian territory. The inventory currently holds over 480,000 landslides and has been available by means of Web services since 2005. The aim of this study is to define quality indices for evaluation of the homogeneity and completeness of the IFFI database. In order to estimate the completeness of the landslide attribute information, a heuristic approach has been used to assign weighting values to significant parameters selected from the landslide data sheet. The completeness and homogeneity of the landslide mapping has been evaluated by means of three different methods: an area-frequency distribution analysis; the proximity of the landslides surveyed to urban areas; variation of the landslide index within the same lithology. The quality indices have allowed identification of areas with a high level of completeness and critical areas in which the data collected have been underestimated or are not very accurate. The quality assessment of collected and stored data is essential in order to use the IFFI database for definition and implementation of landslide susceptibility models and for land use planning and management.

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Authors and Affiliations

  1. ISPRA (Institute for Environmental Protection and Research), via Vitaliano Brancati 48, 00144, Roma, Italy

    Alessandro Trigila, Carla Iadanza & Daniele Spizzichino

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  1. Alessandro Trigila
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  2. Carla Iadanza
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  3. Daniele Spizzichino
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Correspondence to Alessandro Trigila.

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Trigila, A., Iadanza, C. & Spizzichino, D. Quality assessment of the Italian Landslide Inventory using GIS processing. Landslides 7, 455–470 (2010). https://doi.org/10.1007/s10346-010-0213-0

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